automation curve : is this a bug or not?

Hi,

The picture below is at full zoom in.

When I try to put the knot at the bottom, on the grid with the mouse, I can’t! It’s like I can’t have the two knots on the grid at the same time.

I have to enter the position manually for the knot at the bottom to be on the grid at the same time as the upper one. It looks like it’s align at normal zoom, but at full zoom in, I see the two knots are not aligned on the grid (picture below).

It’s really annoying.

Am I the only one having this?